Cemetech’s ultimate calculator V2

[Christopher] piped up in our comments on a recent post about using laptop touch pads in other things, noting that he had done this on his Ultimate Calculator Version 2. What he’s done is upgraded his TI-83+ calculator to house a number of improvements and customizations. It now has a stronger RGB backlight so he can illuminate his screen in whatever color strikes his mood. He also integrated a PS2 port so he could use an external mouse/ keyboard. What brought this to our comments though, was the embedded laptop touchpad on the back that is also fully functional. He topped it all off with a rather pleasing paint job as well.

I like it.
My TI-83+ does not have a backlight, so any backlight would be “stronger”. I’ve wanted to add a 101 keyboard to mine for a long time. I was just going to use the output jack, but this seems a better way to go!

I chose to do this on a TI-83+ instead of an 84+/SE because (1) I have many more 83+s, so it’s less of a problem if I break one or two while creating the mod and (2) the TI-83+ has much more space in the back of the case to fit in mods and circuits.